Flatting turbo adapter plates

[306Puggy]

To add to the recent plethora of adapter plate threads, I thought it would be the right time to ask this question. I have decided to go with gaskets for my setup and obviously the surfaces need to be 99% flat otherwise it will leak and I will have to pull the turbo again. So far I have used 400 grit to sand the surfaces but it seems to lack power. I was thinking of using 260 and then 400, is this really necessary?

[Mal]

I used a 9 inch grinder and grinding disc to flatten out a plate

[306Puggy]

Well I am doing this on a budget so I don't have a grinder but I am guessing nothing too abrasive?

[strictly_perv]

Doesn't need it if I'm honest. At most get an angle grinder and skim it a few times them paste on some paste.
Done.

[Tom]

Your over doing it. Just put something straight against it and if it looks straight then exhaust paste it up and drash on.

[martyn92]

Dont just rub sand paper over it by hand. You need something straight as a guide. I took my plates to get machined flat, cost me £15 I think but I KNEW they would be straight and wouldnt have to take it apart again later on